Go 利用OpenSSL 实现ssl3-md5计算方法

ssl3-md5其实还是md5。。。

openssl list -digest-algorithms

输出：

RSA-MD4 => MD4
RSA-MD5 => MD5
RSA-RIPEMD160 => RIPEMD160
RSA-SHA1 => SHA1
RSA-SHA1-2 => RSA-SHA1
RSA-SHA224 => SHA224
RSA-SHA256 => SHA256
RSA-SHA3-224 => SHA3-224
RSA-SHA3-256 => SHA3-256
RSA-SHA3-384 => SHA3-384
RSA-SHA3-512 => SHA3-512
RSA-SHA384 => SHA384
RSA-SHA512 => SHA512
RSA-SHA512/224 => SHA512-224
RSA-SHA512/256 => SHA512-256
RSA-SM3 => SM3
BLAKE2b512
BLAKE2s256
id-rsassa-pkcs1-v1_5-with-sha3-224 => SHA3-224
id-rsassa-pkcs1-v1_5-with-sha3-256 => SHA3-256
id-rsassa-pkcs1-v1_5-with-sha3-384 => SHA3-384
id-rsassa-pkcs1-v1_5-with-sha3-512 => SHA3-512
MD4
md4WithRSAEncryption => MD4
MD5
MD5-SHA1
md5WithRSAEncryption => MD5
ripemd => RIPEMD160
RIPEMD160
ripemd160WithRSA => RIPEMD160
rmd160 => RIPEMD160
SHA1
sha1WithRSAEncryption => SHA1
SHA224
sha224WithRSAEncryption => SHA224
SHA256
sha256WithRSAEncryption => SHA256
SHA3-224
SHA3-256
SHA3-384
SHA3-512
SHA384
sha384WithRSAEncryption => SHA384
SHA512
SHA512-224
sha512-224WithRSAEncryption => SHA512-224
SHA512-256
sha512-256WithRSAEncryption => SHA512-256
sha512WithRSAEncryption => SHA512
SHAKE128
SHAKE256
SM3
sm3WithRSAEncryption => SM3
ssl3-md5 => MD5
ssl3-sha1 => SHA1
whirlpool

代码：

package main

/*
#cgo CFLAGS: -I ./include
#cgo LDFLAGS: -L ./lib -lcrypto -ldl
#include <stdlib.h>
#include <openssl/evp.h>
*/
import "C"

import (
    "fmt"
    "os"
    "unsafe"
)

func main() {
    strdigestname := "ssl3-md5"
    fmt.Printf("go OpenSSL cgo %s demo/example.\n", strdigestname)
    strdata := "https://const.net.cn/"
    digestname := []byte(strdigestname)
    md := C.EVP_get_digestbyname((*C.char)(unsafe.Pointer(&digestname[0])))
    if md == nil {
        fmt.Printf("Unknown message digest %s\n", strdigestname)
        os.Exit(1)
    }
    md_value := make([]byte, 128)
    md_len := 0
    data := []byte(strdata)
    mdctx := C.EVP_MD_CTX_new()
    C.EVP_DigestInit(mdctx, md)
    C.EVP_DigestUpdate(mdctx, unsafe.Pointer(&data[0]), C.size_t(len(data)))
    C.EVP_DigestFinal_ex(mdctx, (*C.uchar)(unsafe.Pointer(&md_value[0])), (*C.uint)(unsafe.Pointer(&md_len)))
    C.EVP_MD_CTX_free(mdctx)

    fmt.Printf("message digest=%x %s message digest len=%d\n", md_value[0:md_len], strdigestname, md_len)
}

输出：

go run .
go OpenSSL cgo ssl3-md5 demo/example.
message digest=4b655b565c09136dd867a7e523371391 ssl3-md5 message digest len=16
echo -n "https://const.net.cn/" |openssl dgst -ssl3-md5
(stdin)= 4b655b565c09136dd867a7e523371391
echo -n "https://const.net.cn/" |openssl dgst -md5
(stdin)= 4b655b565c09136dd867a7e523371391

本文链接地址：https://const.net.cn/91.html